As a main goal for the player, collecting coins should be one of the most enjoyable aspects of our game. We will create a rewarding animation when the player contacts a coin. Follow these steps to implement coin collection:
In
GameScene.swift, add a new property to theGameSceneclass:var coinsCollected = 0
In
Coin.swift, add a new function to theCoinclass namedcollect:func collect() { // Prevent further contact: self.physicsBody?.categoryBitMask = 0 // Fade out, move up, and scale up the coin: let collectAnimation = SKAction.group([ SKAction.fadeAlphaTo(0, duration: 0.2), SKAction.scaleTo(1.5, duration: 0.2), SKAction.moveBy(CGVector(dx: 0, dy: 25), duration: 0.2) ]) // After fading it out, move the coin out of the way // and reset it to initial values until the encounter // system re-uses it: let resetAfterCollected = SKAction.runBlock { self.position.y = 5000 self.alpha = 1 self.xScale...